diff --git a/instrumentation-genai/opentelemetry-instrumentation-openai-v2/CHANGELOG.md b/instrumentation-genai/opentelemetry-instrumentation-openai-v2/CHANGELOG.md
index e06dea899d..87dc9461e7 100644
--- a/instrumentation-genai/opentelemetry-instrumentation-openai-v2/CHANGELOG.md
+++ b/instrumentation-genai/opentelemetry-instrumentation-openai-v2/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+- Import `OTEL_INSTRUMENTATION_GENAI_CAPTURE_MESSAGE_CONTENT` from
+  `opentelemetry.util.genai.environment_variables` instead of re-defining it locally,
+  making `opentelemetry-util-genai` the single source of truth for this constant.
+  ([#4455](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4455))
 - Fix compatibility with wrapt 2.x by using positional arguments in `wrap_function_wrapper()` calls
   ([#4445](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4445))
 - Fix `ChoiceBuffer` crash on streaming tool-call deltas with `arguments=None`
diff --git a/instrumentation-genai/opentelemetry-instrumentation-openai-v2/src/opentelemetry/instrumentation/openai_v2/utils.py b/instrumentation-genai/opentelemetry-instrumentation-openai-v2/src/opentelemetry/instrumentation/openai_v2/utils.py
index bd566ddba5..128697fe12 100644
--- a/instrumentation-genai/opentelemetry-instrumentation-openai-v2/src/opentelemetry/instrumentation/openai_v2/utils.py
+++ b/instrumentation-genai/opentelemetry-instrumentation-openai-v2/src/opentelemetry/instrumentation/openai_v2/utils.py
@@ -36,6 +36,9 @@
     error_attributes as ErrorAttributes,
 )
 from opentelemetry.trace.status import Status, StatusCode
+from opentelemetry.util.genai.environment_variables import (
+    OTEL_INSTRUMENTATION_GENAI_CAPTURE_MESSAGE_CONTENT,
+)
 from opentelemetry.util.genai.types import (
     InputMessage,
     LLMInvocation,  # pylint: disable=no-name-in-module  # TODO: migrate to InferenceInvocation
@@ -45,10 +48,6 @@
     ToolCallResponse,
 )
 
-OTEL_INSTRUMENTATION_GENAI_CAPTURE_MESSAGE_CONTENT = (
-    "OTEL_INSTRUMENTATION_GENAI_CAPTURE_MESSAGE_CONTENT"
-)
-
 
 def is_content_enabled() -> bool:
     capture_content = environ.get(